Sorry folks, I was mistaken...it was actually the 8" that I used as a replacement. I found the original box from the subwoofer I bought and now I remember the whole story...it was a couple years back.
The audio shop guy tried to tell me it would take a 10", so I bought the thing and wasn't able to fit it without serious modification. I took it back and got the 8" and it fit like a glove. The screw holes aren't an excact match, but you should be able to find a kit to mount it securely. I cut the OEM harness and wired it up and it sounded awesome! :D
Once I saw that the existing screw holes weren't going to work, I decided to take the car to the audio shop and let them mount it securely for a small charge. One thing led to another and I never made it back to the shop. That said, it's been over 2 years and the replacement sub STILL has not been "securely mounted". That's how snug it fits, and it still sounds as good as the day I installed it. :o
Now, I don't recommend this solution, but it seems to have worked for me. I've also been told that vibration around the speaker can cause speaker damage (as well as poor quality sound), but I've not experienced any problems whatsoever, that I can hear at least. Maybe one day I'll get the thing properly mounted, but I'm not in any hurry.
Subwoofer details
Kicker CompVR ($50-$70)
8"
4ohm
DVC Subwoofer
Max Amp Power (watts): 200
Sensitivity (db1w/1m): 83
Frequency Response (Hz): 30-500
Mounting Depth (in., mm): 3-15/16, 100.1
Mounting Hole Diameter (in., mm): 7, 177.8
Item# 01C8VR4
Thanks to jadecuir for triggering my memory